From 383eb1a7287a3e3fdca5a23c7c56a969ab48dd1e Mon Sep 17 00:00:00 2001
From: Salt <rehashedsalt@cock.li>
Date: Sat, 8 May 2021 17:01:20 -0500
Subject: [PATCH] Add ticker script
---
tick | 165 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 165 insertions(+)
create mode 100755 tick
diff --git a/tick b/tick
new file mode 100755
index 0000000..04cfd18
--- /dev/null
+++ b/tick
@@ -0,0 +1,165 @@
+#! /bin/bash
+#
+# tick
+# A program to get the price of a symbol from Binance
+# Copyright (C) 2021 Vintage Salt <rehashedsalt@cock.li>
+#
+# Distributed under terms of the MIT license.
+#
+set -e
+
+# Read-only set-once variables
+declare -r _name="$(basename -- "$0")"
+# Options
+declare -i _opthelp
+declare -i _optverbose
+declare -i _optcolor
+declare _optsymbol
+# Working variables
+declare -a _args
+declare _return
+
+# Helper functions
+log() {
+ # Print a line to the terminal if _optverbose is greater than $2
+ # $2 defaults to 0
+ # loglevel 0: Daily-use messages
+ # loglevel 1: Detailed but not quite debugging
+ # loglevel 2: Definitely debugging
+ [ -z "$1" ] && return 1
+ if (( _optverbose >= ${2:-0} )); then
+ printf "%s\\n" "$1"
+ fi
+}
+warn() {
+ # Print a yellow line to the terminal, respecting _optverbose
+ [ -z "$1" ] && return 1
+ if (( _optverbose >= ${2:-0} )); then
+ if [ -t 1 ]; then
+ printf "\\e[33m%s\\e[0m\\n" "$1"
+ else
+ printf "WARN: %s\\n" "$1"
+ fi
+ fi
+}
+error() {
+ # Print a red line to the terminal, exit if $2 is specified
+ [ -z "$1" ] && return 1
+ if [ -t 2 ]; then
+ printf "\\e[31m%s\\e[0m\\n" "$1" 1>&2
+ else
+ printf "ERROR: %s\\n" "$1" 1>&2
+ fi
+ [ -z "$2" ] && return
+ exit "${2:-1}"
+}
+has() {
+ # Parse out all arguments and try to find them in path
+ # If an argument cannot be found, set _return and fail
+ for prog in "$@"; do
+ if ! command -v "$prog" > /dev/null 2>&1; then
+ _return="$prog"
+ return 1
+ fi
+ done
+ return 0
+}
+
+# Core program functions
+printhelp() {
+ cat << EOF
+Usage: $_name [OPTION]... SYMBOL
+Get the 24hr price change for a particular symbol from Binance
+
+ -c Add color to the output
+ -d SYMBOL Change the symbol displayed. Useful for comparisons against USDC
+ and other stablecoins
+ -h Print this help text
+ -v Print more status messages. Stacks
+
+Copyright (c) 2021 rehashedsalt@cock.li
+Licensed under the MIT license
+EOF
+}
+getprice() {
+ # Get the price of a coin from Binance
+ [ -z "$1" ] && return 1
+ symbol="$1"
+ result="$(curl -sL "https://api.binance.com/api/v3/ticker/24hr?symbol=$symbol")"
+ # Test to see if we got an error
+ if echo "$result" | jq '.code' -e > /dev/null 2>&1; then
+ code="$(echo "$result" | jq -re '.code')"
+ msg="$(echo "$result" | jq -re '.msg')"
+ error "Error $code: $msg" 51
+ fi
+ # Parse out the data
+ if [ -n "$_optsymbol" ]; then
+ symbol="$_optsymbol"
+ else
+ symbol="$(echo "$result" | jq -re '.symbol')"
+ fi
+ price="$(echo "$result" | jq -re '.priceChangePercent')"
+ if [ -n "$_optcolor" ]; then
+ if [[ "$price" == -* ]]; then
+ price="\e[31m$price\e[0m"
+ else
+ price="\e[32m$price\e[0m"
+ fi
+ fi
+ printf "$symbol $price\n"
+}
+
+# Main
+main() {
+ # Parse out arguments
+ while [ -n "$1" ]; do
+ # Parse out flags
+ while getopts ":cd:hv" opt; do
+ case $opt in
+ c)
+ _optcolor=1
+ ;;
+ d)
+ _optsymbol="$OPTARG"
+ ;;
+ h)
+ _opthelp=1
+ ;;
+ v)
+ _optverbose+=1
+ ;;
+ :)
+ error "Option requires argument: -$OPTARG" 2
+ ;;
+ *)
+ error "Invalid option: -$OPTARG" 2
+ ;;
+ esac
+ done
+ # Store arguments
+ shift $((OPTIND - 1))
+ if [ -n "$1" ]; then
+ _args+=("$1")
+ shift
+ fi
+ unset OPTIND
+ done
+ # Early hook for help
+ [ -n "$_opthelp" ] && printhelp && exit 0
+ # Validate critical options
+ if [ -z "${_args[*]}" ]; then
+ error "No symbol specified" 50
+ fi
+ # Validate core program dependencies
+ log "Validating dependencies" 2
+ if ! has basename curl jq; then
+ error "Failed to find program: $_return" 1
+ fi
+
+ # Do the do
+ getprice "${_args[0]}"
+ exit 0
+}
+
+main "$@"
+